Methyl 8a-hydroxy-7-methoxy-5-(methoxymethoxy)-2a-(4-methoxyphenyl)-8-oxo-2-phenyl-1,2-dihydrocyclobuta[b]chromene-1-carboxylate 在
溶剂黄146 、
tetramethylammonium triacetoxyborohydride 作用下,
以
乙腈 为溶剂,
反应 3.0h,
以13%的产率得到methyl (1R,2S,3R,3aR,8bS)-1,8b-dihydroxy-8-methoxy-6-(methoxymethoxy)-3a-(4-methoxyphenyl)-3-phenyl-2,3-dihydro-1H-cyclopenta[b][1]benzofuran-2-carboxylate